Latching mechanism for barber chairs



Feb. 1s, 1930.

J. EMMERT lLA'lGHINGr MECHANISM FOR BARBER CHAIRS Finauan. 17, 1929 Patented Feb. 18, 1930 UNITED STATES LMLSS Partnr ori-'ice JOHN R. EMMERT, OF CHICAGO, IIA'JIYOIS7 ASSIGNOR T0 EMILk J. PAIDAR COMPANY, i

OF CHCAGO, ILLINOIS, A CORPORATION OF ILLINOES LATCHING MECHANSM FOB/'BARBER CHAIRS Application filed January 17, 1929.. Y Serial No. 333,200.

This invention relates to a latching mechanism for barber chairs but susceptible for other uses.

Itis an obj ect of this invention to provide a simple mechanism of the character stated in combination with a plunger for operating the latching mechanism for unlatching the element that is latched thereby.

The invention comprises the novel st-ructure and combination of parts hereinafter described and more particularly pointedv out and defined in the appended claims.

In the accompanying drawings which illustrate a preferred form of this invention and in which similar reference numerals refer to similar features in the different views Figure 1 is an elevational view of a housing in which an element is latched according to this invention.

Figure 2 is a longitudinal section in a vertical plane through said housing illustrating the latching mechanism in its operative position.

Figure 3 is a view similar to Figure 2 illustrating the operating plunger in its lowest position and the latches in their inoperative position.

Figure 4 is an enlarged sectional view taken upon the line IV-IV of Figure l.

Figure 5 is a sectional view taken upon the line V--V of Figure 2, illustrating the latches in top plan view.

In connection with the illustration of this invention, there is shown a cylindrical housing l which has an opened neck portion 1b and a removable plug la at the opposite end. The housing is radially apertured to provide bearings for a shaft 2 which extends through the housing. A pair of cooperating latches 3 surround the shaft 2 within the housing l. Each latch consists of a metal plate having an aperture for receiving the shaft 2 and having an upper inclined portion. Each plate projects below its shaft and the projecting portion of each latch is seated in a groove 4 which is located in the plug la. In referring to Figures 2 and 3, it will be observed that the inner walls of grooves 4 are vertical. The outer walls of the grooves are outwardly inclined walls whereby the latches may assume an. outwardly inclined position as shown in Figure 2 for frictionally engaging the shaft 2 and anchoring the vsame against longitudinal movement. The upper inclined portions of the latches 3 are in the form of narrow` arms 5 which cross each other as shown in Figures 2 and 3. These arms 5 are provided `with limiting shoulders 6. The shoulder on The open neck lb of the housing slidably retains a plunger 7 which has a rounded lower end which is adapted for fitting the angle that is formed between the two cross arms 5 of the latch plates 3.- When the plunger 7 is depressed as shown in Figure 3, it will move the two latch plates 3 from the inclined latching position shown in Figure 2 to a true vertical unlatching position as shown in Figure 3. When the pressure upon thel plunger 7 lis released, the twolatch plates 3 will be automatically separated and move to the inclined position shown in Figure 2 by means of a coiled spring Swhich is located around the shaft 2 and between the tv/o latchplates.

From the foregoingdisclosure anddescription, it will be apparent that a very siinplekk and efficient latching mechanism has been provided for readily controlling the sliding movement of an element. In addition, the latching mechanism is always reliable in that it will always lock the shaft against movement in inclinedk position and releasethe shaft from any frictional engagement invertical position. This is due to the fact that the two latch members cannot be inclined toward each other to exercise a frictional breaking action upon the shaft on account of the shoulders G upon the arms 5 of the latching mechanism. y

l am aware that many changes may be made, and numerous details of construction ice v may be varied through a Wide range Without departingv from the principles of this invention, and I therefore do not purpose limiting the patent granted hereon,v otherwise than` necessitated by the prior art. I claim= as invei'itoni Yl. A la'tching' mechanismV cfo and 'extending into said grooves, said latch plates having portions that cross each other,

crossed portions of said latch plates.

2. The combi-nation With;V alv slidable ele; i

ment tol be latohedg'of a' paire-f latch membersi slli'clably mounted uponl said'I element',

means for anchoring' one o-E the e'ridsof each x.la-tch"inemberisaid latchA members having portions that cross each other` and a slidable y plufgV for engaging the crossedportionso'f said' y latching members.

3.- rllhe combination With asl-idabl'eele .mentfofmeans or'lfat'ching said slidahle element against movement comprising pair of latchl membersv mounted upon saidE elenfient7 yielding means tending toseparate saidf latchlr members,1said'7 lat-chi members having oppo- Y sitely directed inclined arms that cross'each other, each inclined arm hav-ing ashoulder for! coactionf Withi the other inclined arm and a slidable plunger-l for engaging the'- crossed arms of 'said latch members'.-

4. Ina latchin'g rnechanisn'i,l ahous'ing, afslidable elementetendingthroughlsaidhonsi f ing,l a; pair- 'ofV latehing" menibersmountfec-1g e p upon saidV lelement and having their'teriniL Illinois.

nals extending ther'ehejvond,meansv for" an-v choring said terminals -or lan'g'i'lla''r movement;-

the'lotll'er' .terminals of said latching `men-ibers' consisting lof reduced parts crossing each: otherpeachqrejduced'- part having a shoulder 1 forengagingithe other' reduced part,- said housingha'vi'ngla bearing andfa'plunger slidablyy mountedf in i said bearing for engaging the crossed parts-ofsaid latchingfmernbier-fs.v

In testimony'vvhereof I* have hereunto subscribedmy name 'at Chicago',- Coeli Gounty,

JOHN R.Y EMM-Enr prisin'g ahousing, an element slidable in said housing, Y

Asaid housing having a pair of Vgrooves-, a pai-r 'of latch plates mounted uponsaid` element 

